Consolidated Statements Of Cash Flows (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income	$ 1,503	$ 1,564	$ 1,592
Adjustments to Reconcile Net Income to Net Cash Flows from Operating Activities:
Gain on Disposal of Discontinued Operations	(122)	0	0
Depreciation and Amortization	982	974	838
Amortization of Nuclear Fuel	153	136	121
Provision for Deferred Income Taxes (Other than Leases) and ITC	811	1,106	326
Non-Cash Employee Benefit Plan Costs	175	315	347
Lease Transaction Reserves, net of tax	170	0	(29)
Net (Gain) Loss on Lease Investments	(55)	(56)	(167)
Leveraged Lease Income, Adjusted for Rents Received and Deferred Taxes	(55)	(336)	(678)
Net Realized and Unrealized (Gains) Losses on Energy Contracts and Other Derivatives	(165)	50	25
Over (Under) Recovery of Electric Energy Costs (BGS and NTC) and Gas Costs	43	(36)	(32)
Over (Under) Recovery of Societal Benefits Charge (SBC)	(96)	(123)	4
Market Transition Charge Refund	(61)	84	0
Cost of Removal	(62)	(58)	(54)
Net Realized (Gains) Losses and (Income) Expense from NDT Funds	(117)	(106)	(50)
Loss on Early Extinguishment of Debt	17
Net Change in Tax Receivable	673	(689)	0
Net Change in Certain Current Assets and Liabilities	247	(221)	221
Net Change in Certain Current Assets and Liabilities:
Employee Benefit Plan Funding and Related Payments	(508)	(508)	(446)
Other	41	68	(163)
Net Cash Provided By (Used In) Operating Activities	3,557	2,164	1,855
CASH FLOWS FROM INVESTING ACTIVITIES
Additions to Property, Plant and Equipment	(2,083)	(2,160)	(1,794)
Proceeds from Sale of Discontinued Operations	687	0	0
Proceeds from the Sale of Capital Leases and Investments	179	496	880
Proceeds from Sales of Available-for-Sale Securities	1,355	1,116	1,769
Investments in Available-for-Sale Securities	(1,386)	(1,140)	(1,798)
Restricted Funds	0	(2)	116
Other	(21)	21	35
Net Cash Provided By (Used In) Investing Activities	(1,269)	(1,669)	(792)
CASH FLOWS FROM FINANCING ACTIVITIES
Net Change in Commercial Paper and Loans	(64)	(466)	511
Issuance of Long-Term Debt	794	1,728	459
Redemption of Long-Term Debt	(1,514)	(775)	(820)
Repayment of Non-Recourse Debt	(1)	(32)	(286)
Redemption of Securitization Debt	(206)	(197)	(187)
Premium Paid on Debt Exchange/Redemption	(17)	(18)	(36)
Cash Dividends Paid on Common Stock	(693)	(693)	(673)
Redemption of Preferred Securities	0	(80)	0
Other	(33)	(32)	(2)
Net Cash Provided By (Used In) Financing Activities	(1,734)	(565)	(1,034)
Net Increase (Decrease) In Cash and Cash Equivalents	554	(70)	29
Cash and Cash Equivalents at Beginning of Period	280	350	321
Cash and Cash Equivalents at End of Period	834	280	350
Supplemental Disclosure of Cash Flow Information:
Income Taxes Paid (Received)	(219)	1,070	1,364
Interest Paid, Net of Amounts Capitalized	479	444	500
PSEG [Member]
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income	1,503	1,564	1,592
Power [Member]
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income	1,098	1,143	1,189
Adjustments to Reconcile Net Income to Net Cash Flows from Operating Activities:
Gain on Disposal of Discontinued Operations	(122)	0	0
Depreciation and Amortization	231	194	203
Amortization of Nuclear Fuel	153	136	121
Interest Accretion on Asset Retirement Obligation	18	18	27
Provision for Deferred Income Taxes (Other than Leases) and ITC	231	650	133
Non-Cash Employee Benefit Plan Costs	41	71	76
Net Realized and Unrealized (Gains) Losses on Energy Contracts and Other Derivatives	(165)	50	25
Net Realized (Gains) Losses and (Income) Expense from NDT Funds	(117)	(106)	(50)
Loss on Early Extinguishment of Debt	17	0	0
Net Change in Certain Current Assets and Liabilities:
Fuel, Materials and Supplies	(26)	135	97
Margin Deposit	49	(91)	(31)
Accounts Receivable	197	(105)	109
Accounts Payable	(154)	17	(115)
Accounts Receivable/Payable-Affiliated Companies, net	459	(386)	75
Other Current Assets and Liabilities	30	(66)	(27)
Employee Benefit Plan Funding and Related Payments	(129)	(132)	(114)
Other	1	38	(60)
Net Cash Provided By (Used In) Operating Activities	1,812	1,566	1,658
CASH FLOWS FROM INVESTING ACTIVITIES
Additions to Property, Plant and Equipment	(757)	(825)	(869)
Settlement Of Spent Nuclear Fuel Claim	0	16	47
Proceeds from Sale of Discontinued Operations	687	0	0
Proceeds from Sales of Available-for-Sale Securities	1,355	989	1,769
Investments in Available-for-Sale Securities	(1,380)	(1,013)	(1,798)
Restricted Funds	0	2	115
Short-Term Loan - Affiliated Company, net	(509)	(398)	55
Other	26	24	29
Net Cash Provided By (Used In) Investing Activities	(578)	(1,205)	(652)
CASH FLOWS FROM FINANCING ACTIVITIES
Issuance of Long-Term Debt	544	594	209
Contributed Capital	0	0	230
Redemption of Long-Term Debt	(1,250)	(248)	(294)
Repayment of Non-Recourse Debt	0	0	(280)
Premium Paid on Debt Exchange/Redemption	(17)	(13)	(101)
Cash Dividends Paid on Common Stock	(500)	(549)	(940)
Short-Term Loan - Affiliated Company, net	0	(194)	194
Other	(10)	(4)	0
Net Cash Provided By (Used In) Financing Activities	(1,233)	(414)	(982)
Net Increase (Decrease) In Cash and Cash Equivalents	1	(53)	24
Cash and Cash Equivalents at Beginning of Period	11	64	40
Cash and Cash Equivalents at End of Period	12	11	64
Supplemental Disclosure of Cash Flow Information:
Income Taxes Paid (Received)	171	539	584
Interest Paid, Net of Amounts Capitalized	176	151	160
PSE&G [Member]
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income	521	359	325
Adjustments to Reconcile Net Income to Net Cash Flows from Operating Activities:
Depreciation and Amortization	719	750	608
Provision for Deferred Income Taxes (Other than Leases) and ITC	571	444	194
Non-Cash Employee Benefit Plan Costs	118	217	236
Over (Under) Recovery of Electric Energy Costs (BGS and NTC) and Gas Costs	43	(36)	(32)
Over (Under) Recovery of Societal Benefits Charge (SBC)	(96)	(123)	4
Market Transition Charge Refund	(61)	84	0
Cost of Removal	(62)	(58)	(54)
Net Change in Tax Receivable	(16)	0	0
Net Change in Certain Current Assets and Liabilities:
Accounts Receivable and Unbilled Revenues	252	(21)	152
Fuel, Materials and Supplies	(4)	(20)	(9)
Prepayments	0	(31)	(41)
Accounts Receivable/Payable-Affiliated Companies, net	197	(286)	(62)
Other Current Assets and Liabilities	(40)	68	(34)
Employee Benefit Plan Funding and Related Payments	(330)	(327)	(288)
Other	(36)	(9)	(42)
Net Cash Provided By (Used In) Operating Activities	1,776	1,011	957
CASH FLOWS FROM INVESTING ACTIVITIES
Additions to Property, Plant and Equipment	(1,302)	(1,257)	(855)
Solar Loan Investments	(51)	(27)	(43)
Proceeds from Sales of Available-for-Sale Securities	0	54	1
Investments in Available-for-Sale Securities	0	(54)	(1)
Other	(1)	4	5
Net Cash Provided By (Used In) Investing Activities	(1,354)	(1,280)	(893)
CASH FLOWS FROM FINANCING ACTIVITIES
Net Change in Commercial Paper and Loans	0	0	(19)
Issuance of Long-Term Debt	250	1,114	250
Contributed Capital	0	0	250
Redemption of Long-Term Debt	(264)	(400)	(203)
Redemption of Securitization Debt	(206)	(197)	(187)
Cash Dividends Paid on Common Stock	(300)	(150)	0
Redemption of Preferred Securities	0	(80)	0
Deferred Issuance Costs	(4)	(10)	(2)
Other	0	(3)	(4)
Net Cash Provided By (Used In) Financing Activities	(524)	274	85
Net Increase (Decrease) In Cash and Cash Equivalents	(102)	5	149
Cash and Cash Equivalents at Beginning of Period	245	240	91
Cash and Cash Equivalents at End of Period	143	245	240
Supplemental Disclosure of Cash Flow Information:
Income Taxes Paid (Received)	(514)	73	5
Interest Paid, Net of Amounts Capitalized	$ 297	$ 294	$ 299